Răspunsuri

2014-11-09T14:01:26+02:00
18 km/h= 18000 m/s
144km/h= 144000m/s
2014-11-09T14:02:43+02:00
18km/h=1800m/3600s=0,5 m/s
144km/h=144000m/3600s=40 m/s